Blade unit retaining casings and storage tray

ABSTRACT

A tray is provided for storing a plurality of casings in side by side relationship and adapted to permit successive removal of individual casings therefrom. Each casing has received therein a single head unit for a safety razor, the head unit incorporating at least one blade and a head member to which the blade is permanently secured and which provides a guard surface and the head unit being detachably engageable with a safety razor handle. Each head unit is retained in its casing against accidental removal in such a manner that the cutting edge of the (or each) blade is protected against damage and the head unit is engageable by the handle while the unit is still within the case so that the heat unit when engaged with the handle may be withdrawn from the casing by means of the handle.

United States Patent Pomfret BLADE UNIT RETAINING CASINGS AND STORAGETRAY Appl. No.: 334,415

[30] Foreign Application Priority Data Feb. 22. 1972 United Kingdom8103/72 [52] US. Cl. 206/354; 30/402; 206/359 [51] Int. Cl. A45c 11/00[58] Field of Search 30/40. 40.2, 34 R; 206/16 B, 16 C, 16 BC 16 A, 352,354, 359

[56] References Cited UNITED STATES PATENTS 1.813.686 7/1931 Stetson206/16 B 3.388831 6/1968 Hansom 30/40..2 X

Glaberson 30/40 Dawidowicz 30/402 Primary Examiner-Al Lawrence SmithAssistant E.\'am|'nerGary L. Smith [57] ABSTRACT A tray is provided forstoring a plurality of casings in side by side relationship and adaptedto permit successive removal of individual casings therefrom. Eachcasing has received therein a single head unit for a safety razor, thehead unit incorporating at least one blade and a head member to whichthe blade is per manently secured and which provides a guard surface andthe head unit being detachably engageable with a safety razor handlerEach head unit is retained in its casing against accidental removal insuch a manner that the cutting edge of the (or each) blade is protectedagainst damage and the head unit is engageable by the handle while theunit is still within the case so that the heat unit when engaged withthe handle may be withdrawn from the casing by means of the handle.

15 Claims, 6 Drawing Figures BLADE UNIT RETAINING CASINGS AND STORAGETRAY The invention relates to safety razors which comprise a handle anda replaceable head unit detachably secured to the handle, the head unitcomprising not only at least one blade but also a member (convenientlymade of plastics material) to which the blade is permanently secured andwhich provides the guard surface for engaging the skin ahead of thecutting edge of the blade. The invention provides new or improvedprotective packaging for the replaceable head units of such razors.

The invention provides the combination of a head unit for a safety razorand a protective casing for the head unit, wherein the head unitincorporates at least one blade and a head member to which the blade ispermanently secured and which provides a guard surface, the head unitbeing detachably engageable with a safety razor handle, and wherein thecasing is adapted to receive a single head unit and to retain the lattertherein against accidental removal in such a manner that the cuttingedge of the (or each) blade is protected against damage and wherein thehead unit is engageable by the said handle while the unit is stillwithin the case, the head unit when engaged with the handle beingwithdrawable from the casing by means of the handle.

The invention also includes such a combination further comprising a trayfor storing a plurality of the said casings in side-by-siderelationship, and adapted to permit successive removal of single casestherefrom.

Preferably, at least the casing is so constructed that it can bere-engaged over the head unit while the latter is secured to the handleto afford temporary protection to the cutting edge during the intervalbetween successive shaving uses. It can also be so re-engaged when thehead unit has reached the end of its useful life and it is desired toreplace it by a fresh unit; the handle is then disconnected from theunit while the latter is retained within the casing, so that the cuttingedge (or edges) of the discarded head unit are shielded by the casingand the risk of their causing damage is avoided.

Further features and advantages of the invention will sufficientlyappear from the following description, given with reference to theaccompanying drawing, of a preferred embodiment of the invention. In thedrawmg:

FIG. I is a perspective front view of a razor handle, a razor head unitand a protective casing for the head unit, shown separated from oneanother;

FIG. 2 is a perspective rear view of the head unit and the casing;

FIG. 3 is a plan view on an enlarged scale of a container holding fourof the protective casings, which for clarity of illustration are shownempty, although in practice each of them will contain a razor head unit;

FIGS. 4 and 5 are sectional views taken on the lines IV-IV and V-Vrespectively of FIG. 3; and

FIG. 6 is an end view of the container.

The razor handle 6 shown in FIG. 1 and the razor head unit 7 shown inFIGS. I and 2 do not themselves form any part of the present inventionand it is deemed unnecessary to describe them fully. It will be seenthat the handle 6 includes a pair of rails 8 which can be slidablyengaged with a pair of undercut flanges 9 on the head unit 7. The headunit includes a pair of blades 10 having spaced, parallel cutting edgesarranged to follow one another over the skin. the blades and a toothedspacing member ll disposed between them being permanently secured in atwo-part member of plastics material which provides inter alia theflanges 9 and a guard surface 12 for engaging the skin ahead of thecutting edges.

The protective casing 20 for the head unit 7 has the general form of anopen-topped rectangular box and is conveniently made as an integralmoulding of transparent plastics material. The base 21 of the boxprojects beyond the end walls 22, 23 to form lugs 24. One end wall 23 isformed with an externally projecting rectangular lug 25. The oppositeend wall 22 is formed with a projection 26 of the same externaldimensions but taking the form of a narrow rim bordering an opening 27formed through the end wall 22. One side wall 28 of the box has its edgeformed with two spaced notches 29. Adjacent the end walls 22 and 23,there are provided projections 30 adapted to locate and support the endportions of the head unit 7. Side wall 28 is formed with an inwardlyprojecting lip 31 adapted to cooperate with a shoulder 13 on the headunit and the other side wall 32 is formed with a projection 33 adaptedto co-operate with the guard surface 12 of the head unit. The bottom ofthe box is provided with low relief projections 34.

If the longitudinal edge of the head unit which is shown uppermost inFIG. I is inserted into the casing so that shoulder 13 is engaged behindlip 31 and the head unit is then turned (counterclockwise in FIG. I)about a longitudinal axis defined by lip 31, guard surface 12 engagesthe face of projection 33 and exerts a camming action thereon. Thematerial of which the casing is made allows this camming action to forcethe side walls 28 and 32 sufficiently apart to allow the head unit tosnap into a position in which it seats on projections 30 and isrestrained against accidental removal from the casing by the engagementof the parts 31 and 33 of the casing with the parts 13 and 12respectively of the head unit. To assist snap-insertion of the headunit, a pair of slits 50 may be provided in wall 28 adjacent lip 31.When the head unit 7 is thus packed within its protective casing 20, thecutting edges of the blades are enclosed within the casing but are heldwell spaced from the inner surface of the casing and are thus securelyprotected against damage.

The provision of opening 27 in end wall 22 of the easing allows therails 8 of razor handle 6 to be engaged by longitudinal sliding movementwith flanges 9 of a head unit while the latter is still in positionwithin its casing 20. When the handle has thus been securely attached tothe head unit, the head unit can readily be removed from the casing byturning the razor handle (clockwise in FIG. 1) relative to the casing,so as to spring the unit out of the casing. By corresponding reversemovement the casing can readily be re-applied to the head unit while thelatter is still connected to the handle, either to provide temporaryprotection to a head unit which is capable of further use, or to allowdisposal of a head unit which is to be discarded. In the latter case, ofcourse, after engaging the head unit in the casing, the razor handle isdisconnected from the head unit by appropriate sliding movement and canthen be engaged with a fresh head unit.

FIGS. 3 to 5 show four of the protective casings 20 packaged in acontainer from which they can be removed one at a time. In practice, ofcourse, each casing 20 will contain a head unit 7, as already described,but

for clarity of illustration FIGS. 3 to 5 show the casings empty.

The container 40 has the form of a shallow rectangular tray oropen-topped box. integrally moulded from a suitable plastics material,and is of a size to accommodate five of the casings disposed side byside. It has a base 41, end walls 42, 43 and a pair of side walls 44.Each side wall 44 is formed adjacent its upper edge with an inwardlyprojecting flange 45 which extends longitudinally over four fifths ofthe length of the tray. that is the part occupied by the four casings20. Flanges 45 engage over the projections and 26 of the casings andprevent the latter from being lifted out of the container. The flangesare of triangular section, as shown in FIG. 5, thus allowing the casingsto be inserted (open face downwards) into the container by pressing themdown against the sloping faces of the flanges and forcing the side walls44 apart. To facilitate such resilient yielding of the side walls, theextremities of end wall 43 are not joined to the side walls but arespaced slightly apart from them. The parts of the side walls notprovided with flanges 45 are formed with cut outs 46. The base 41 of thecontainer is formed with two pairs of upwardly projecting ratchet teeth47 and 48 whose positions across the width of the container correspondsto those of the notches 29 in the side walls of the casings 20.

When the four casings are positioned in the container as shown in thedrawing, they are prevented against moving longitudinally of thecontainer by the end wall 43 and by the engagement of the pair of teeth47 with the side wall 30 of the left hand casing 20. By pressing againstthe right hand casing 20, the four casings can be shifted leftwardstogether through a distance equal to the width on one casing, theresilience of the container material allowing overriding of the teeth47, bringing the left hand casing against the end wall 42. During thefinal part of this movement the side wall 30 of the right hand casingrides over the teeth 48, which prevent any return movement to the rightof the casings. The movement has carried the projections 25, 26 of theleft hand casing beyond the ends of the container flanges 45, so thatthis casing is held in the container only by being frictionally grippedbetween the next casing and the end wall 42, which is of slightly bowedform. The left hand casing can accordingly easily be lifted out of thecontainer, making the razor head unit which it contains accessible forconnection to the razor handle in the manner already described. The lugs24 on the casing and the cut outs 46 in the container walls facilitateremoval of the casing from the container.

The three casings now remaining in the container are still retainedtherein by the flanges 45 and are held against movement longitudinallyin either direction by the teeth 47 and 48. While the head unit which itcontained is in service, the empty casing can be replaced temporarily inthe vacant space at the left hand end of the container from which it waswithdrawn. After re loading the empty casing with a used razor headunit, as described above, this casing can be inserted into the vacantspace at the right hand end of the container (the lugs 24 ensuring thatthe casing is inserted open side down) and thereafter the four casingscan be moved leftwards together in the manner already described to bringthe second casing into position for removal.

What we claim is:

l. The combination of a plurality of individual protective safety razorhead unit casings and a tray for storing said plurality of the saidcasings in side-by-side relationship,

each said casing having a single safety razor head unit therein, eachsaid head unit incorporating at least one blade and a head member towhich the blade is permanently secured and which provides a guardsurface, said head unit being detachably engageable with a safety razorhandle, each said casing defining a single chamber in which a singlehead unit is received, structure in said casing for retaining said headunit therein against accidental removal in such a manner that thecutting edge of said blade is protected against damage and wherein saidhead unit is engageable by the said handle while said head unit is stillwithin said chamber, each said head unit when engaged with the handlebeing withdrawable from its casing by means of the handle,

said tray including resilient securing structure constructed to secureeach individual casing in said tray in aligned side-by-side relationshipwith another casing secured in said tray.

2. A combination according to claim 1, wherein insertion of the headinto said box and removal of the lat ter therefrom are permitted byresilient deformation of the material of which the box is made, the headmember co-acting with the box to effect such deformation.

3. A combination according to claim 1 wherein said head unit hasattachment means on a surface thereof opposite said guard surface, saidattachment means being engageable by the said handle by transverserelative sliding movement of the said handle and said head unit in thelongitudinal direction of said head unit (parallel with the blade edge)and said box has at least one of its said end walls formed with a notchto permit sliding insertion of the said handle in the said longitudinaldirection.

4. A combination according to claim 3 and further including a flangeoutwardly projecting from each said end wall for facilitating manualgripping of said box during engagement of said head unit by the handleand withdrawal of said head unit from said box by means of the handleand during reinsertion of said head unit into said box for storage andsubsequent disengagement of the handle from said head unit.

5. A combination according to claim 1 wherein each said casing comprisesan open-topped rectangular box having two opposed side walls, twoopposed end walls, and a base that defines a single chamber in whichsaid head member is received, and internal projecting means in said boxwhich make snap fitting engagement with said head unit to retain saidhead unit in said box against accidental displacement from said box.

6. The combination of a plurality of individual protective safety razorhead unit casings, each said casing having a single safety razor headunit therein, each said head unit incorporating at least one blade and ahead member to which the blade is permanently secured and which providesa guard surface, said head unit being detachably engageable with asafety razor handle, each said casing receiving a single head unit andretaining the latter therein against accidental removal in such a mannerthat the cutting edge of said blade is protected against damage andwherein said head unit is engageable by the said handle while said headunit is still within its casing, each said head unit when engaged withthe handle being withdrawable from its casing by means of the handle,and a tray for storing said plurality of the said casings inside-by-side relationship, structure in said tray for guiding successiveremoval of individual casings therefrom and said casings beingpositioned on said tray such as to prevent access to the head unit ineach said casing prior to removal of said casing from said tray.

7. A combination according to claim 6 wherein each said casing comprisesan open-topped rectangular box having two opposed side walls, twoopposed end walls, and a base that defines a single chamber in whichsaid head member is received, internal abutment means in said box forengagement by parts of said head member to hold the cutting edge of saidblade spaced from the interior surfaces of said box, and internalprojecting means in said box which make snap fitting engagement withsaid head unit to retain said head unit in said box against accidentaldisplacement from said box, said boxes being assembled in securedrelation to said tray with their open tops against the floor of saidtray, said boxes being provided with stop means which prevent theirassembly to said tray in any other attitude.

8. The combination of a plurality of individual protective safety razorhead unit casings, each said casing having a single safety razor headunit therein, each said head unit incorporating at least one blade and ahead member to which the blade is permanently secured and which providesa guard surface, said head unit being detachably engageable with asafety razor handle, each said casing comprising an open-toppedrectangular box having two opposed side walls, two opposed end walls,and a base that defines a single chamber in which said head member isreceived, internal abutment means in said box for engagement by parts ofsaid head member to hold the cutting edge of said blade spaced from theinterior surfaces of said box, and internal projecting means in said boxwhich make snap fitting engagement with said head unit to retain saidhead unit in said box against accidental displacement from said box insuch a manner that the cutting edge of said blade is protected againstdamage and wherein said head unit is engageable by the said handle whilesaid head unit is still within its box, each said head unit when engagedwith the handle being withdrawable from its casing by means of thehandle, stop structure projecting externally from each said box, and atray for storing said plurality of the said casings in side-by-siderelationship, said tray having opposed side walls which are formed withlongitudinally extending internal rails which cooperate with said stopstructure of individual boxes to prevent the latter from being removedfrom said tray while said stop structures are in engagement with saidrails, each said stop structure slidingly engaging said rail to guidethe box towards one end of said tray, said rails being interrupted forpassage of the stop structure from said tray therethrough.

9. A combination according to claim 8 wherein said tray is constructedof a resiliently flexible material and said rails and said stopstructures are constructed to permit snap fitting insertion of saidboxes into said tray between said rails.

10. A combination according to claim 9, wherein said rails have internalside faces sloping inwardly and downwardly towards said floor of thetray, said faces providing cam-surfaces facilitating outward deflectionof said side walls of said tray upon insertion of the casmgs.

11. A combination according to claim 10 wherein the floor of said trayis provided with upstanding projections which permit movement of saidboxes thereover towards the said one end of the tray, but which resistmovement of said boxes thereover in the reverse directron.

12. The combination of a plurality of individual protective safety razorhead unit casings, each said casing having a single safety razor headunit therein, each said head unit incorporating at least one blade and ahead member to which the blade is permanently secured and which providesa guard surface, said head unit being detachably engageable with asafety razor handle, each said casing comprising an open-toppedrectangular box having two opposed side walls, two opposed end walls,and a base that defines a single chamber in which said head member isreceived, and internal projecting means in said box which make snapfitting engagement with said head unit to retain said head unit in saidbox against accidental displacement from said box in such a manner thatthe cutting edge of said blade is protected against damage and whereinsaid head unit is engageable by the said handle while said head unit isstill within its box, each said head unit when engaged with the handlebeing withdrawable from its casing by means of the handle, stopstructure projecting externally from said box, and a tray for storingsaid plurality of the said casings in side-by-side relationship, saidtray having opposed side walls which are formed with longitudinallyextending internal rails which cooperate with said stop structure ofindividual boxes to prevent the latter from being removed from said traywhile said stop structures are in engagement with said rails, each saidstop structure slidingly engaging said rail to guide the box towards oneend of said tray, said rails being interrupted for passage of the stopstructure from said tray therethrough.

13. A combination according to claim 12 wherein said tray is constructedof a resiliently flexible material and said rails and said stopstructures are constructed to permit snap fitting insertion of saidboxes into said tray between said rails.

14. A combination according to claim 13 wherein said rails have internalside faces sloping inwardly and downwardly towards the floor of saidtray, said faces providing cam-surfaces facilitating outward deflectionof said side walls of the tray upon insertion of said boxes.

15. The combination of a plurality of individual protective safety razorhead unit casings, each said casing having a single safety razor headunit therein, each said head unit incorporating at least one blade and ahead member to which the blade is permanently secured and which providesa guard surface, said head unit being detachably engageable with asafety razor handle, each said casing receiving a single head unit andretaining the latter therein against accidental removal in such a mannerthat the cutting edge of said blade is protected against damage andwherein said head unit is engageable by the said handle while said headunit is still within its casing, each said head unit when engaged withthe handle being withdrawable from its casing by means of the handle,and a tray for storing said plurality of the said casings inside-by-side relationship, the floor of said tray being provided with anupstanding projection, the casings being movable across the projectiontowards one end of said tray, said projection resisting a movement ofsaid casings thereover in the reverse direction.

1. The combination of a plurality of individual protective safety razorhead unit casings and a tray for storing said plurality of the saidcasings in side-by-side relationship, each said casing having a singlesafety razor head unit therein, eaCh said head unit incorporating atleast one blade and a head member to which the blade is permanentlysecured and which provides a guard surface, said head unit beingdetachably engageable with a safety razor handle, each said casingdefining a single chamber in which a single head unit is received,structure in said casing for retaining said head unit therein againstaccidental removal in such a manner that the cutting edge of said bladeis protected against damage and wherein said head unit is engageable bythe said handle while said head unit is still within said chamber, eachsaid head unit when engaged with the handle being withdrawable from itscasing by means of the handle, said tray including resilient securingstructure constructed to secure each individual casing in said tray inaligned side-byside relationship with another casing secured in saidtray.
 2. A combination according to claim 1, wherein insertion of thehead into said box and removal of the latter therefrom are permitted byresilient deformation of the material of which the box is made, the headmember co-acting with the box to effect such deformation.
 3. Acombination according to claim 1 wherein said head unit has attachmentmeans on a surface thereof opposite said guard surface, said attachmentmeans being engageable by the said handle by transverse relative slidingmovement of the said handle and said head unit in the longitudinaldirection of said head unit (parallel with the blade edge) and said boxhas at least one of its said end walls formed with a notch to permitsliding insertion of the said handle in the said longitudinal direction.4. A combination according to claim 3 and further including a flangeoutwardly projecting from each said end wall for facilitating manualgripping of said box during engagement of said head unit by the handleand withdrawal of said head unit from said box by means of the handleand during reinsertion of said head unit into said box for storage andsubsequent disengagement of the handle from said head unit.
 5. Acombination according to claim 1 wherein each said casing comprises anopen-topped rectangular box having two opposed side walls, two opposedend walls, and a base that defines a single chamber in which said headmember is received, and internal projecting means in said box which makesnap fitting engagement with said head unit to retain said head unit insaid box against accidental displacement from said box.
 6. Thecombination of a plurality of individual protective safety razor headunit casings, each said casing having a single safety razor head unittherein, each said head unit incorporating at least one blade and a headmember to which the blade is permanently secured and which provides aguard surface, said head unit being detachably engageable with a safetyrazor handle, each said casing receiving a single head unit andretaining the latter therein against accidental removal in such a mannerthat the cutting edge of said blade is protected against damage andwherein said head unit is engageable by the said handle while said headunit is still within its casing, each said head unit when engaged withthe handle being withdrawable from its casing by means of the handle,and a tray for storing said plurality of the said casings inside-by-side relationship, structure in said tray for guiding successiveremoval of individual casings therefrom and said casings beingpositioned on said tray such as to prevent access to the head unit ineach said casing prior to removal of said casing from said tray.
 7. Acombination according to claim 6 wherein each said casing comprises anopen-topped rectangular box having two opposed side walls, two opposedend walls, and a base that defines a single chamber in which said headmember is received, internal abutment means in said box for engagementby parts of said head member to hold the cutting edge of said bladespaced from the interior surfaces of said box, and internal projectiNgmeans in said box which make snap fitting engagement with said head unitto retain said head unit in said box against accidental displacementfrom said box, said boxes being assembled in secured relation to saidtray with their open tops against the floor of said tray, said boxesbeing provided with stop means which prevent their assembly to said trayin any other attitude.
 8. The combination of a plurality of individualprotective safety razor head unit casings, each said casing having asingle safety razor head unit therein, each said head unit incorporatingat least one blade and a head member to which the blade is permanentlysecured and which provides a guard surface, said head unit beingdetachably engageable with a safety razor handle, each said casingcomprising an open-topped rectangular box having two opposed side walls,two opposed end walls, and a base that defines a single chamber in whichsaid head member is received, internal abutment means in said box forengagement by parts of said head member to hold the cutting edge of saidblade spaced from the interior surfaces of said box, and internalprojecting means in said box which make snap fitting engagement withsaid head unit to retain said head unit in said box against accidentaldisplacement from said box in such a manner that the cutting edge ofsaid blade is protected against damage and wherein said head unit isengageable by the said handle while said head unit is still within itsbox, each said head unit when engaged with the handle being withdrawablefrom its casing by means of the handle, stop structure projectingexternally from each said box, and a tray for storing said plurality ofthe said casings in side-by-side relationship, said tray having opposedside walls which are formed with longitudinally extending internal railswhich cooperate with said stop structure of individual boxes to preventthe latter from being removed from said tray while said stop structuresare in engagement with said rails, each said stop structure slidinglyengaging said rail to guide the box towards one end of said tray, saidrails being interrupted for passage of the stop structure from said traytherethrough.
 9. A combination according to claim 8 wherein said tray isconstructed of a resiliently flexible material and said rails and saidstop structures are constructed to permit snap fitting insertion of saidboxes into said tray between said rails.
 10. A combination according toclaim 9, wherein said rails have internal side faces sloping inwardlyand downwardly towards said floor of the tray, said faces providingcam-surfaces facilitating outward deflection of said side walls of saidtray upon insertion of the casings.
 11. A combination according to claim10 wherein the floor of said tray is provided with upstandingprojections which permit movement of said boxes thereover towards thesaid one end of the tray, but which resist movement of said boxesthereover in the reverse direction.
 12. The combination of a pluralityof individual protective safety razor head unit casings, each saidcasing having a single safety razor head unit therein, each said headunit incorporating at least one blade and a head member to which theblade is permanently secured and which provides a guard surface, saidhead unit being detachably engageable with a safety razor handle, eachsaid casing comprising an open-topped rectangular box having two opposedside walls, two opposed end walls, and a base that defines a singlechamber in which said head member is received, and internal projectingmeans in said box which make snap fitting engagement with said head unitto retain said head unit in said box against accidental displacementfrom said box in such a manner that the cutting edge of said blade isprotected against damage and wherein said head unit is engageable by thesaid handle while said head unit is still within its box, each said headunit when engaged with the handle being withdrawable from its casing bymeans of the handle, stop structure projecting externally from said box,and a tray for storing said plurality of the said casings inside-by-side relationship, said tray having opposed side walls which areformed with longitudinally extending internal rails which cooperate withsaid stop structure of individual boxes to prevent the latter from beingremoved from said tray while said stop structures are in engagement withsaid rails, each said stop structure slidingly engaging said rail toguide the box towards one end of said tray, said rails being interruptedfor passage of the stop structure from said tray therethrough.
 13. Acombination according to claim 12 wherein said tray is constructed of aresiliently flexible material and said rails and said stop structuresare constructed to permit snap fitting insertion of said boxes into saidtray between said rails.
 14. A combination according to claim 13 whereinsaid rails have internal side faces sloping inwardly and downwardlytowards the floor of said tray, said faces providing cam-surfacesfacilitating outward deflection of said side walls of the tray uponinsertion of said boxes.
 15. The combination of a plurality ofindividual protective safety razor head unit casings, each said casinghaving a single safety razor head unit therein, each said head unitincorporating at least one blade and a head member to which the blade ispermanently secured and which provides a guard surface, said head unitbeing detachably engageable with a safety razor handle, each said casingreceiving a single head unit and retaining the latter therein againstaccidental removal in such a manner that the cutting edge of said bladeis protected against damage and wherein said head unit is engageable bythe said handle while said head unit is still within its casing, eachsaid head unit when engaged with the handle being withdrawable from itscasing by means of the handle, and a tray for storing said plurality ofthe said casings in side-by-side relationship, the floor of said traybeing provided with an upstanding projection, the casings being movableacross the projection towards one end of said tray, said projectionresisting a movement of said casings thereover in the reverse direction.